getting error when generating image on moblie

[supremeliuao]

code:

domtoimage.toBlob((this.$refs.eoPosterContent as HTMLBaseElement))
      .then((blob: Blob) => {
        this.isDownloading = false;
        this.downloadTxt = 'downloading image';
        const link = document.createElement('a');
        link.download = `${ this.reportInfo.title }-${ Date.now().toString(16) }.png`;
        link.href = URL.createObjectURL(blob);
        link.click();
        URL.revokeObjectURL(link.href);
      }).catch((err) => {
        console.log(err);
        this.isDownloading = false;
        (this as any).$notify({
          message : 'image error',
          type : 'error'
        });
      })

error

moblie env

• chrome: 76.0.3809.132
• android 11
• dom-to-image 2.6.0

why does this error occur, but there is no useful troubleshooting info in the error object.